minutes. The tunnel's sealed tight." Freedman knew the ship. His ship was due, with Graham at the wheel. Freedman knew where the radio was on the mother-ship. He dashed down the deck. The radio man was flashing signals to Parma, warning all flights to wait for approval to come ahead. Freedman slammed himself down at the board. He plugged in the tunnel speaker. The power board showed zero. The mighty voice that could speak to anyone in the tunnel was dead. "The guns shook some wires loose," the control man said. "We'll try the electro-screen." They worked swiftly, trying to contact Jerry Graham. Finally his voice came on to the screen. He had a cheerful grin on his face. "Hey," he said, "what's wrong at tunnel head? I'm getting a whistle on the screen but I can't tune you in. Something wrong with your transmission." "For Heaven's sake, Jerry," Freedman shouted, "turn back, don't come through." Graham looked puzzled. "Seems like I hear a voice," Graham was saying. His eyes were bright and sparkling behind his specs. "You guys playing a joke on me? I can hear something that sounds like a voice, but I can't hear words. Just a jumble." "Jerry," Freedman shouted. "The tunnel head is blown out." The control man was working furiously with the set. "Sure, we'll have a blow out," Graham said. The smile was broad on his lips. Five minutes to the tunnel head. Five minutes between that smile—and sudden death. "What the hell," Freedman said. "We've got to get this set running." "Hey," Jerry Graham was saying, "what is wrong with your sender? The screen is blurred. The static is awful. Clear it up, will you?" "Can't," Freedman mumbled to himself. Perspiration stood out on his face. "Can't, Jerry. Can't." The control man continued to work. "Never had this happen before," he said. "Guns were raising hell for a while. They blew out the tubes on both sets. Wire shorted somewhere. Can't find it."